To determine Potential and Real Yields, the total number of ears
and the quantity of sick ears from the 2 central furrows of each plot
were counted. Of those, 22 were taken at random and weighed,
then a sub-sample of 5 ears was weighed and shelled. Seed moisture
was determined using a John Deere Brand Grain Moisture Tester,
and this value and the recorded weight were used to calculate
the shelled factor (SF) using the following formula: